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Force sensor method and construction

  • US 7,325,460 B2
  • Filed: 10/11/2005
  • Issued: 02/05/2008
  • Est. Priority Date: 07/08/2004
  • Status: Expired due to Fees
First Claim
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1. A method of making a force sensor, particularly sensitive to the axial component of an applied force, said force sensor being of the type including a force-receiving membrane deformable by an applied force to be sensed, said method comprising:

  • providing the force sensor with a body of a liquid, and with a second membrane separated from said force-receiving membrane by said body of liquid;

    applying the force to be sensed to the center of said force-receiving membrane to thereby pressurize said liquid according to the magnitude and axis of the force applied to said force-receiving membrane; and

    measuring the deformation of said second membrane;

    wherein said force-receiving membrane is of a non-undulating configuration in its normal condition and is deformable, by a force applied to its center at an oblique angle to its surface, into an undulating configuration, to include an inwardly-bowed section on one side of its center, and an outwardly-bulged section on the opposite side of its center, such that the liquid body is pressurized by the applied force only according to the axial component of said applied force.

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